With the right features and the right buyer, any price is possible.
I part out 4Runners from time to time. I've purchased running, repairable 4Runners (I don't repair them though) for as low as $600 for a 2WD model here in Sacramento. I'll also see ones around 150K miles, 4WD, good paint, meticulous records of every service done, character references, medical records, volunteer hours completed, whatever and an asking price of near $10K. They sell at or near that price because there's buyers out there that will only buy a used vehicle off a private seller if they do have every service record available since the beginning of time. So for whatever reason that will forever baffle me, it's worth it to that person to pay several thousand more just for that.
As a general rule of thumb though, a decent condition 4WD 4Runner with 200K miles in Sacramento is worth around $6K. More if less miles and more if it's been lifted with aggressive looking tires.